Hot air furnace



HOT AIR FURNACE Filed March 18. 1930 lnuantut' Alfred Dayle:

Patented-June 23, 1931 I I I i UNITED STATES PATENT OFFICE Application filed March 18, 1930. Serial No. 436,814.

, My invention relates to improvements in dwelling to the base 9 of the furnace casing hot air furnaces incorporating what are 10. It being understood that the cold air known as blowers or forced draft mechadescends the pipe 7 into the air chambers nisms, and the object of my invention is to surrounding the furnace and passes from utilize aportion of the air draft supplied thence through the hot air pipes 11 back 55 to the furnace as a means for improving into the dwelling. The number of cold air the air circulation throughthe furnace. inlet pipes 7 and hot air pipes 11 being de-..

A further object of my invention is to pendent upon the size of the furnace and the provide for the injection of water into the dwelling. I

blower conduit whereby the air passing The upper end 12 of my conduit 6 is 60' therethrough vaporizes the water and beturned downwardly into the centre of the comes damp or humid. A portion of'such cold air conduit 7, and is provided at its humid air enters the furnace in the normal open end with a draft deflector cone 13 manner and the other portion enters the air which is supported by a plurality of memcirculating system around the furnace thus bers- 14 and spaced away from such open 65 humidifying the'heatedair-passing into the end. The upper ends of the members 14 are dwelling in which the furnace is contained. secured to a collar 15 which is slidably My invention consists of a hot air furnace" .mounted upon the end of the conduit so constructed and arranged all as hereinafter that the distance between the cone 13 and more particularly described and illustrated the open end of the conduit can be regulated. 7 in the accompanyin drawing in which. A set screw 16 is furnished for securing the The figure is a si e elevational view-of a collar 15 in its adjusted position. furnace, blower mechanism and air circulat- A water supply pipe 17 communicates ing conduits, portions of such conduits bewith the air draft conduit 5 in the vicinity in broken away. of the blower end thereof, being connected 7 y invention is capable of installation in to any suitable source of water supply, and any hot air furnace incorporating an artififurnished with a cook 18 for regulating the cial air draft mechanism, such as the blower passage of water through the pipe 17 into 1 illustrated in the drawing. Blowers of the conduit 5. At the other end of the so this general typeare finding increasing faconduit, I provide a water sump and dirt so vor as they-permit the use of coke or hard collector 19 to which is connected a water coal screenings in domestic furnaces. This drain pipe 20 and a drainage cook 21. The class of a fuel which costs considerably less pipe 20 extends into the sump intermedithan the corresponding lump varieties, alately of its depth so thatany dlrt collecting aathoughcontaining approximately the same within 'thesump is withheld from passing 85 heating units is difficult to burn without the into-the drain pipe. The cock 21' is furuse of a forced draft, consequently neces-- nished for draining the dirt or sediment out sitating the ever increasing use of blower ofthe sump. For regulating the passage mechanisms. 1 i of air through the air draft conduit 5 into In the standard mechanism of this type the furnace, I provide a butterfly valve 22 90 such as illustrated, the blower 1 which conin the conduit adjacent .to the furnace. sists of a fan in a casing,'is actuated by When the furnace is alight and the blower means of an electrical motor 2 controlled fan 1 actuating, the air enters the furnace by a thermostat 3, and the blower connected through the cold air pipe 7 and upon being to the furnace underneath the fire box 4 by heated passes therefrom through the hot 95" an air draft conduit 5. air pipes 11 into the. dwelling. The air In my invention I provide an air conduit draft passes from the blower .1 through the 6 which extends from the conduit 5 to the conduit 5 and into the furnace, the passage cold air inlet pipe 7 which generally exof air through the conduit 5-be1ng regulated tends from a grating 8 in the floor of the by the valve 22. A portion of the air draft cold air pipe 7, flowing in the same direc tion as the passage of cold air down the pipe into the furnace. As the air draft is ejected from the end of the pipe 6, it strikes the cone l3 and in spreading creates a down draft in the cold air pipe 7. In this manner, the air passing down the cold air pipe 7 through the furnace and outlet pipes 11 is kept in constant circulation; so that all the rooms in the dwelling can be retained at an even temperature.

In supplying water to the conduit 5 through the pipe 7, I have provided means whereby the air entering the cold air pipe 7 a through the conduit 6 is constantly damp, thus any desired humidity of the air passing through. the furnace into the dwelling may be obtained, the amount of water introduced to the air current being regulated by the valve 18.

The introduction of water into the air conduit 5 cleans the air of any dust that it has accumulated in its passage through the dwelling, such dampened dust collecting in the sump 19. The introduction of damped air into the combustion chamber of the furnace is also beneficial, in that the dampness settles the ash, thus keeping it from blowing about when the furnace is being cleaned out.

From the foregoing description it willbe apparent that I have devised a particularly simple and efiicient means for insuring a constant circulation of air through hot air furnaces, and also have provided means whereby such circulated air can be kept at any desired humidity. Although I have shown and described a articular embodiment of my invention, it is to be understood that I can make such changes and alterations as I may from time to time deem necessary, without departing from the spirit of my invention asset forth in the appended claims.

What I claim as my invention is:

1. In a forced draft hot air furnace of the character described, the combination with the forced air draft delivery conduit and the air circulation supply conduit to the furnace, of a third air conduit extending from the forced draft delivery conduit to the air circulation supply conduit, the

end of the third conduit projecting into the centre of the air circulation supply conduit and extending in the same direction as the' air flow in the air supply conduit, and means for spreading the air passing from the third conduit into the air supply conduit.

2. In a forced draft hot air furnace of the character described, the' combination with the forced air draft delivery conduit and the air circulation supply conduit to the furnace, of a third air conduit extending from the forced draft delivery conduit to the air circulation supply conduit, the end of the third conduit projecting into the centre of the air circulation supply conduit and extending in the same direction as the air flow in the air supply conduit, and a cone member positioned interiorly of the air supply conduit adjacent to the end of the third conduit for spreading the air passing from said third conduit into the air sup 1y conduit.

3. In a forced draft hot air urnace of the character described, the combination with the forced air draft delivery conduit and the air circulation supply conduit to the furnace, of a third conduit extending from the forced draft delivery conduit to the .air circulation supply conduit, the end of the third conduit projecting into the air circulation supply conduit and extending in the same direction as the air flow in said supply conduit, and a water injection member communicating with the forced draft delivery conduit at a point prior to the airdraft entrance of the third conduit. 7

ALFRED 

